Architecture Week Design Community - - This architecture and design web portal provides forums for public communication on world architecture, sustainable design, 3D design and 3D computer graphics.
i-Think - - An online community for the property, architecture and construction sectors, dedicated to professional networking, stimulating debate on sustainability in the built environment and showcasing best practice.
Talkin' About Architecture - - A Yahoo group to express opinions or ask questions about architecture and art. Registration required.